IS SMALL
Introduction
The IS_SMALL packet is a general purpose packet comprised of 8 bytes. The packet is designed to prevent repeating a common structure which would be the same for many packets. Unlike the IS_TINY the IS_SMALL also contains the UVal, a 4 byte unsigned integer.
| Type | Name | Description |
|---|---|---|
| byte | Size | 8 |
| byte | Type | ISP_SMALL |
| byte | ReqI | 0 unless it is an info request or a reply to an info request |
| byte | SubT | subtype, from SMALL_ enumeration (e.g. SMALL_SSP) |
| unsigned | UVal | value (e.g. for SMALL_SSP this would be the OutSim packet rate) |
Packet Details
Size
The size of the packet, always 8 bytes.
Type
The packet type from the ISP_ enumeration, always ISP_SMALL.
ReqI
ReqI must be set to non-zero when sending a request for information to LFS, and in turn the replying packet will contain the same value set in its ReqI. For packets sent by LFS without a request, ReqI is zero.
SubT
The packet's sub-type, which is a value from the SMALL_ enum.
- SMALL_NONE: Not used
- SMALL_SSP: Request to start sending OutSim packets at the specified interval
- SMALL_SSG: Request to start sending OutGauge packets at the specified interval
- SMALL_VTA: Send to set the current vote action, from the VOTE_ enumeration
- SMALL_TMS: Send in single-player mode to stop time, 1 means to stop and 0 to carry on. This freezes the game but is not the same as pausing, as the game must be unfrozen before any further actions can be undertaken
- SMALL_STP: Send when frozen to update the game time by the specified hundredths
- SMALL_RTP: Sent in response to an IS_TINY with a SubT of TINY_GTH. Contains the time in ms.
- SMALL_NLI: Send to set the IS_NLP/IS_MCI interval
- SMALL_ALC: Send to set allowed cars; sent in reply to IS_TINY TINY_ALC.
- SMALL_LCS: Send to set the local car's switches; sent in reply to IS_TINY TINY_LCS.
- SMALL_LCL: Send to set the local car's lights; sent in reply to IS_TINY TINY_LCL.
- SMALL_AII: Send to request a local AI car's info.
Note: SMALL_TMS and SMALL_STP are currently not available in LFS 0.8B/InSim 10.
UVal
A general purpose 4-byte unsigned integer, the meaning of which varies depending on SubT.
